ISD1964SYI Datasheet, PDF (24/29 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP, MULTIPLE-MESSAGE VOICE RECORD/PLAYBACK DEVICE

ISD1900
9. TYPICAL APPLICATION CIRCUIT
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The following typical application examples on ISD1900 series are for references only. They make no
representation or warranty that such applications shall be suitable for the use specified. It’s customer’s
obligation to verify the design in its own system for the functionalities, voice quality, current consumption,
and etc.
In addition, the below notes apply to the following application examples:
• The suggested values are for references only. Depending on system requirements, they can be adjusted
for functionalities, voice quality and degree of performance.
It is important to have a separate path for each ground and power back to the related terminals to minimize
the noise. Besides, the power supplies should be decoupled as close to the device as possible.
Also, it is crucial to follow good audio design practices in layout and power supply decoupling. See
recommendations in Application Notes from our websites.
Example #1: Operations via start and end address under Address Mode.
To switches or
address I/Os
VCC
4.7 k Ω∗
4.7 k Ω∗
4.7 k Ω∗
4.7μ F*
0.1 μ F*
0.1μ F*
4.7μ F*
Rosc*
REC
Addr
PLAYE
LED
PLAYL
S3
S2
S1
S0
XCLK
V_CCD
V_SSD
E3
V_CCA
E2 ISD1900
E1
V_SSA
E0
V_CCP
FT
V_SSP1
Mic+_AnaIn
Mic-
V_SSP2
AGC
SP+/AUX
Rosc
SP-/NC
1 K Ω ^D1
V_CCD
0.1μ F
Vcc
VCCA
VCCD
VCCP
10μ F*
V_CCA
0.1μ F
10 μ F*
0.1μ F
10 μF*
V_CCP
10μ F*
0.1μ F
Speaker
Gnd
Publication Release Date: Jan 5, 2009
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Revision 0.51